﻿// Spun AJAX Framework
// Copyright (C) 2008 Blake Hegerle
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Spun.Models.Sequences;

namespace Formality.Server
{
    public class ListSequence<T> : Sequence<T>
    {
        public ListSequence()
            : base(typeof(ListSequence<T>), false, true)
        { List = new List<T>(); }

        #region Sequence overrides
        public override uint Count
        {
            get { return (uint)List.Count; }
            set
            {
                if (value != List.Count)
                    throw new Exception("Illegal attempt to change the length of a ListSequence");

                Update(COUNT_NAME, value);
            }
        }

        public override T this[uint Index]
        {
            get { return List[(int)Index]; }
            set
            {
                List[(int)Index] = value;
                Update(ModelMemberName((uint)Index), value);
            }
        }

        public override IEnumerator<T> GetEnumerator()
        {
            return List.GetEnumerator();
        }
        #endregion

        public void Add(T item)
        {
            List.Add(item);
            Count = (uint)List.Count;
        }

        public void Clear()
        {
            Count = 0;
        }

        private List<T> List;
    }
}
